A018993 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AWW = AlPO4-22 [Al24P24O96].2R starting with a T2 atom.

3, 7, 42, 219, 1011, 5598, 34646, 224809, 1501860, 10113371, 68641436, 470506018, 3252534733, 22668508169, 159249668294

Offset

2,1

References

G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.

Links

Table of n, a(n) for n=2..16.

G. Thimm, Cycle sequences of crystal structures

Crossrefs

Sequence in context: A086397 A229941 A019018 * A217759 A160615 A106965

Adjacent sequences: A018990 A018991 A018992 * A018994 A018995 A018996

Keyword

nonn,more,changed

Author

Georg Thimm (mgeorg(AT)ntu.edu.sg)

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 16 2019

Status

approved